If you are familiar with Sploder and have dabbled with GameMaker then this could be for you. Make PC and iPhone games with Gamefroot instantly with no programing or downloads necessary.
Now while it states "make your own playable games instantly", it will take time to make your game. I would rate this online game engine for medium level game makers but it does look very good and worth learning. There are so many features of Gamefroot that remind me of Sploder and GameMaker. It's worthwhile checking out and registering to try this one out. Start off by making a simple game and take it from there. Check out the Featured Tour for a basic explanation. This is also suitable for advanced game makers with it's advanced features and script editor. Don't forget to check out the games as well.
Homepage
http://gamefroot.com